Fertilizer and method of making



Reissued Nov. 26, 1940 I OFFICE FERTILIZER. AND METHOD OF MAKING SAMELewis Treeland, Kansas City, Kans. No Drawing. Original No. 2,165,592,dated July 11, 1939, Serial No; plication for reissue 353,317

8 Claims.

This invention relates to a fertilizer and the method of making thesame, and consists in a fertilizer made by impregnating an absorbentgranular material with certain of the more vola- .tile fertilizingingredients, then coating said granules with a material to. seal saidcertain ingredients in said granules, and then intermixing this granularmaterial in a mixture of super phosphate and black loam soil.

use of commercial fertilizers due to the fact that certain of theelements, such as nitrogen and potash, have a tendency to cause awilting or killing of the plants. This is due principally to the l factthat too large a quantity of these ingredients are present and in directcontact with the plant. Furthermore, these ingredients. when in a freestate, are quickly dissipated and lost. Other ingredients of thefertilizer are less active .0 and need not be specially treated toprevent detrimental effects and loss.

It is the purpose of this invention to overcome the above difficultiesand to produce a convenient fertilizer that retains its constituentparts for a long period of time and one that will not wilt or kill theplants.

It is the principal object of the present invention to produce afertilizer comprising a plurality of ingredients, some of which aresealed within a granular material, and others being freelyintermixedwith the granules of said ma terial.

In the preparation of this fertilizer, an absorbent granular material,such as wood pulp,

saw dust, etc., is thoroughly impregnated with a substantially saturatedsolution of sulphate of ammonia, muriate of potash and water. After t egranules are thoroughlyimpregnated, any excess liquid is drained oil andthen the granules are intermixed with a composition consisting of about90% of mineral black, a powdered graphite, or graphite shale, and 10% ofcarbon'black to form a coating on the granules suitable for closing thepores of the granules to prevent rapid 5 escape ules. This coating isnot entirely impervious to water, but is sufllcient to retain thechemicals and. prevent any rapid dissipation thereof, and so long as thefertilizer is in storage and not 5 subjected to the earth moisture, itwill retain the granules in a substantially sealed condition for a longperiod of time.

This sealed and impregnated granular material is then intimately mixedwith a composi- 55 t f s p r p o p ate and. black loam soil.

149,438,-June 21, 1937.

August 19, 1940, Serial No.

Much difficulty has been experienced in the,

of the chemicals retained within the gran- This composition consists offinely divided particles and serves as an absorbent for any of themoisture that might escape from the granules, and also has considerablefertilizing value.

It will be noted that within the coated gran- 5 ules the nitrogen andpotash materials are encased. These ingredients, if present in too largequantities, are detrimental and cause a wilting of the plants. Thephosphoric acid ingredient is freely mixed in the fertilizer and isadapted to 10 be taken up by the plants in proper quantities as needed,without any detrimental effect to the. plant when in excessivequantities.

The mineral black and carbon black not only serve as a coating for thegranules, but also provide essential elements for plant life.

After long tests, the following has been found to produce a verysatisfactory fertilizer for lawns. etc.: twenty-five (25) pounds ofsulphate of ammonia and eight (8) pounds of murlate of go potashdissolved in water and incorporated into twenty-five (25) pounds of sawdust or wood pulp. To this impregnated saw dust is added two andone-half (2 pounds' of a composition consisting of 90% mineral black and10% 25 carbon black. After suflicient intermixing of this compositionwith saw dust, a thin coating of the composition covers the granules andserves as a partial coating to retain thechemicals within the granulesof saw dust. Eighteen (18) pounds 30 of superphosphate, which containsabout 20% of phosphate, is thoroughly intermixed with twenty (20) poundsof any dry black loam soil. These ingredients are preferably finelyground, and are incorporated with the saw dust so as to $5 obtain auniform composition. The carbon and mineral black, when applied to thesaw dust,

' present a smooth surfaced'granule of relatively slight cohesive oradhesive property, thereby insuring a free mechanical mix of thefertilizer 40 which will remain in a free and separable state suitablefor spreading over the surface of the lawn.

, For-the various uses,, fertilizers of different relative quantities ofthe ingredients may be used without departing from the spirit of thisinvention.

It will be noted that this fertilizer, among other ingredients, providesfor an ample supply a of nitrogen, potash and phosphoric acid which areoften found depleted in many of our soils.

An analysis of any particular soil may be made to determine whichelements are most needed and the fertilizer will be made to bring it upto a given standard for proper plant nourishment.

impregnated with However. for general use, the composition set forthabove is very satisfactory.

What I claim and desire to secure by Letters Patent is: v

1. A fertilizer comprising absorbent granules sulphate of ammonia andmuriate of potashand coated with amixtureof substantially 90% of.mineral black and 10% of carbon black, used in an amount approximately4% of the weightof the material being coated.

2. A fertilizer comprising substantially 25 pounds of sulphate ofammonia and 8 pounds of muriate of potash, incorporated within thegranules of 25 pounds absorbent granular material;

and a surface covering on said granules consist-,

ing of a mixture of 54 pound of carbon black and 2% pounds of mineralblack.

3.- The method of making a fertilizer comprising impregnating anabsorbent granular material with a solution of sulphate of ammonia andmuriate of potash, and intermixing and coating said impreflnatedgranules with a mixture of substantially'90% of mineral black and 10% ofcarbon black used in an amount approximately 4% of the weight of thematerial being coated.

. 4. The method of making ing impregnating the granules of a mass ofgranular material with a solution saturated with salts containingnitrogen and potassium in combined form, and intermixir-z and coatingsaid impregnated granules with a mixture of substantially 90% of mineralblack and 10% of carbon black used in an amoimt ap 4% of the weight ofthe material being coated.

sisting of a mixture 5. A fertilizer comprising absorbent granularmaterial impregnated with fertilizer salts and coated with a mixture ofapproximately 90% mineral 'black and 10% carbon black in the proportionof approximately 4% mixture by weight of material being coated.

.6. The method 01' making a fertilizer consisting of impregnatingabsorbent granular material with fertilizer salts, and applying acoating on the granules of said impregnated material conof approximately90% mineral black and 10% carbon black in the proportion ofapproximately 4% mixture by weight of v the impregnated material.

7. The method of making a fertilizer comprising impregnating thegranules of a mass of absorbent granular material with a solution madefrom fertilizer salts, and applying a coating on said impregnatedgranules consisting of a mixture of approximately 90% mineral black andapproximately 10% carbon black in the proportion of approximately 4%mixture by weight of the impregnated material.

8. A fertilizer comprising a mass of absorbent granular material inwhich the granules of said material are impregnated with a solution madefrom fertilizer salts, said imp egnated granules having coated thereon amixture of approximately 90% mineral black and approximately 10% carbonblack in the proportion of a 4% mixture by weight of the imp natedmaterial.

